Damper control means



Dec. 19, 1944. o, vYQUNG 2,365,319

DAMPER CONTROL MEANS Filed April 30,1945 2 Sheetsj'SheetjZ INVENTOR M0.BMM.

. damper member close.

Patented Dec. 19, i944 UNITED vSTATES PATENT OFFICE` DAMPER ooNrRL MEANSEmil O. Young, Cleveland, lOhio Application April 30, 1943, Serial No.485,245

1 claim. ('01. sas-11o)V This invention vrelates to damper controlmeans,

particularly means that are used in air conditioning dampers forcontrolling the movement of y -the various bladey members comprising thedampers.

It is the purpose of this invention to provide novel and sensitivecontrol means for dampers, which are used in combinatiomso as to causethe movement of the blade members of one damper to openwhile ,the blademembers of an associated With the particular kind of Vdamper used in airconditioning where a supply of conditioned air and fresh air is desiredto be mixed, or otherwise controlled so as to regu- -late the flow ofone or the other of the fresh aire ed to operate in unison so as toaccurately in crease or decrease the volume of air owing through thedamper unit as a whole.

Therefore, a pair of dampers is contemplated,

the blade members of one set being under the control of an actuatingmeans, and the blade members of another set being under the control ofthe same actuating means, so as to cause theopposite movement of therespective blade members, as desired, and'with an. independence ofmovement forthe purposes of air conditioning practise. j

This invention, therefore, broadly contemplates the use of a pair ofdamper units in which the blade members operatein the manner hereinaboveset forth.` However, the manner of controlling the blade members isimportant, and is particularly regulated in thisI invention by means ofspring tension members, which are so mounted in conjunctionwith therespective blade members of the damper units as' to cause the movementof the set of blades used'with the fresh air damper to open positionbymeans of a spring, and to oppositely bias the damper ,membersforblades of ,the other of the damper `members to closed po- `sition at thesame time,vunder the control of the members is shown. l

In the drawings- Figure l is a side elevation of the damper unuitincluding upper and lower damper members with the blades of the uppermember in open-position and those of the lower member in closedposition.

Figure 2 is a sectional view taken about on the l line 2-2 of Figure 1,looking in the direction of the line 3-3 of Figure 1, looking in thedirection of the arrows, illustrating the control means for the lowerset of blade or vane members.

" 'Figure 4 is a fragmentary perspective view oi Figure l, illustratingthevactuating bar, lever and link parts of Figure 2 primarily, forcontrolling the movement of the blade members.

Referring particularly to Figure 1, it will be noted that the damperunit, of thisinvention, is comprised of what may be termed an outershell I of substantially rectangular formation, having mounted thereinfresh air blade or vane members 2 and 3, the same being duplicatedthroughout the length of the damper member, and conditioned air blade,or vane members 4 and 5 likewise being duplicated throughout the lengthof the conditioned air damper member.

Suitable motor control means 6 are shown as being mounted adjacent theupper portion of the damper unit', although since cable means 1 areavailed of. this motor unit 6 may be mounted at some other location forsuitably controlling the movement to be hereinafter described.

l Adjacent one end of the shell I, suitable tubing members 8 and 9,through which the cables I pass, are supported on a bracket IIJ, thepurpose of these tubing members 8 and 9 being set forth in relation toFigures 2 and 3, now to be de-Y metal members, and are controlled bymeans of link members I5, pivotally engaged at I6 andISa, above andbelow the pivotal points II and I2, looking at Figure 2, and in turn,the blade member 2 is engaged by means of an extension ,member I1 at apivotal point I8, upon a longitudinal bar I9. It should be understoodthat the blades or vanes 2v throughout the length of the air supplydamper member now being described, will be similarly engaged with thebar I9.

Adjacent the upper edge of the blade 3, a suitable felt strip 20 isprovided adapted to seal the damper member when the vanes 2 and 3 areVthe `dotted lines in this figure.

suitable linkage may be provided such as is illustrated, and whichcomprises a. projection 22, suitably rigidly engaged with the bar I 9,and a short link 24 pivotally connected with the member 22, and a mainlever 25 pivotally engagedwith the link 24 at 26, the main lever 25being in turn vpivctally engaged at 21 to a portion of the shell I inwhich the vanes or blades 2 and 3 'are pivotally mounted,

Asuitable guide 28 is provided on'the member I 4 for limiting thepivotal movement of the main 1ever 25. Likewise, engaged with the partI4 is tension adjustment means generally denoted 29, andiiastened at oneend to the tension adjustment means 29 is a spring 30, the other end ofthe said spring being engaged with the main lever 25. The main lever 25is likewise engaged with the cable Ia which is a part of the cable l,previously referred to.

From the foregoing, it will be observed that since the pivot 21 is anxed pivot, movement of the lever 25 into the dotted line position shown`in Figure 3, will, under contractingmovement of the spring 3D, causethe bar I9 to move toward the right. This, in turn, will move the bladeor vane member 2 in a counter-clockwise direction toward the dotted lineposition shown in this figure, and by reason ofthe link I5, connectionof the blade or vane 2, vwith the vane 3, will cause the said vane 3 tomove clockwise toward the dotted line position. .There is, therefore,ef-

fected an opposite movement of .the .said blade or vane members 2 and 3,as respects their rotative movement simultaneously. The ymovement of theblade or vane members toward and from the limit of their positions, asillustrated in full and dotted lines, will, therefore, control the flow`of air in the direction of the arrow so as .to increase or decrease.the flow in accordance with the requirements of theeventual place ofuse of the air. It will be noted that thespring 30 causes the movementof the blade or vane members 2 and 3, out of the closed position shownin Figure 3, upon relieving the tension upon the cable part 1a. This, ofcourse, is regulated by the movement of the motor unit 6 mounted onthedamper unit.

Referring now to Figure 2, it will be observed that the vane and linkageconnections are the Asame as those illustrated in Figure 3, with thenotable exception that the connection of the spring 3l with themainlever 32 of this damper member will cause the movement of the bar 33vtoward the right, but since the vane or blade members 4 and 5 areinterconnected by means of the links 3'4, rightward movement of the bar33 will cause the said blade or vane members 4 and 5 to move toward aclosed position illustrated in The lever 32 is connected with projection22' by link 24. This movement is similarly under the control of aspring, namely, 3l, but as contrasted with the cable parts 'Ib and 'Iaare positioned to form the' cable 1, and the tension is released in bothof these cable parts, at the same time, it will be seen that the springs30 and 3I, cause simultaneous but opposite movement of the respectiveblade members controlled thereby. This is a novel feature of theinvention, and provides adequate and sensitive control for the variousblade or vane members without the necessity of a rigid connection to theoperating motor l.

It should be noted that these damper members, as illustrated `in Figures2 and 3, are in reality exactly similar members, but by reason of theirassociation in the damper unit as a whole, are caused to operate inopposite directions.

This relationship is further pointed out by noting thatthe .dampermember of Figure 3 ismerely transposed in Figure '2, so as to icause"the Figure 2 member to be that of .the oppositehand.

This is a novel means of availing of the lpeculiar linkage structureused, and permitting the same to be controlled by the springs 30 and 31,so as to move oppositely upon relieving of the vtension in the cableparts 'la and'lb. i

It will be understood that the Vtube members B and 9 are primarily guidemeans for the cable parts 'Ia and 1b, to permit the 'mounting of thecontrol motor 6 above the damper unit, and 'as before pointed out, itwill be apparent that'additional tubing members such as the members '-8and 9 may be availed of, if the 'motor -6 lis mountedl at some otherlocation.

Of course, it will` rbe apparent that by'causing a tensioning of thecables mand 1b, the expanding 'movement of the springs 30 and 3I,controlled respectively bythe cable parts, will causethe blades of their'respective damper members to move toward closed and open positionsrespectively.

The cable 'I vis bifurcated 'from just above "the tube members 8 and 9to provide the cable parts 'la and 1b.

Having thus described'my invention, what jI claim as new and desire tosecure `by Letters Patent of the United States is:

In a damper unit, a casing comprising Atwo compartments in superposedrelation'w'itha space therebetween, a damper member in each ccmpartmentincluding a plurality of blades, arranged in connected'pairs and pivotedlto the opposite upper and lower sides of each compartment, the axes ofthe blades of one damper being alined with those of the other, likemeans Vin said space to open and close pairs of the blades of eachdamper member, each said means 4comprising a longitudinal bar connectedwith the blades of each damper, a pivoted lever connected at a pointbetween its ends with said bar'and pivoted at one end to the casing, aguide part for the the adjacent wall of the casing, and instrumen'-talities external to the casing for pullingon `the cable means tooperate the blades of the dampers.

EMIL C. YOUNG.

